Butt joint for rails



April s, 19m. 1,490,032

G. scHoNwALD" BUTT JOINT FoRnAIs Filedxfeb. 1o.v 192s "fk @g1 1J 20| a- 7 al@ B 10 7j ...l "Il v-Il E 2 s I g @Tag/fa?? 6. @21Min/wad Patented Apr. 8, 1924,

UNTED STATES GEORG SCHNWALD, OF BERLIN, GERMANY.

BUTT JOINT FOR RAILS.

Application filed February 10, 1923.

To all fw 710m t may concern Be it known that I, Gaone SCHNWALD,l

of German nationality, residing at 38 Danziger' Strasse, Berlin, N. O. 55, Germany, have invented certain new and useful Improvements in and Relating to Butt Joints for Rails; and I do hereby declare the following to be a full, clear, and exact description of the invention, o-f which the following is a specication.

The invent-ion relates to butt-joints for rails, its main feature being to free the fish plates, which heretofore have been used with great success for connecting the rail ends, from forces acting in a vertical direction and also to provide means for transmitting these forces, such transmitting means being rigidly connected to the rail ends and forming the two rail ends into one unit absolutely capable of resisting bending forces without however preventing the longitudinal extension or dilatation of the rails.

The invention consists in mounting on each rail and rigidly or if ,required in a detachable manner a bridge part, and in so constructing both bridge parts that they mesh with each other in a. rigid and unelastic manner, the number and size of the lamellee meshing with-each other being so chosen that the lamelles are capable of transmitting without play the force exerted on one rail end by a. passing load to the other rail end.

A further feature of the invention consists in giving the various lamellae such a. shape that they tend to stilfen each other and that also when used in a rail curve they still have the same effect and that at the same time they greatly increase the resistibility of the connection against. transverse forces.

Finally the invention consists in making the meshing of both bridge parts of such a length only that between the ends of the lamellae sufficient play is left, in order to allow an unrestricted longitudinal extension of the rail ends caused by the lreat.

These and other important effects may for instance be obtained by a. device or by means respectively as illustrated on the accompanying drawings and described in the following specification.

Fig. 1 is a side view of the new railjoint, partly in section,

SerialV No. 618,263.

Fig. 2 a plan of Figure 1, and Fig. 3 a section along the line A-B of Figure 1.

Referring now to the drawings and par-l ticularly to the mode of construction shewn thereon, 1 and 2 denote the. two rail ends to be connected with each other having between them the space 1 required for eX- pansion. The rail ends are connected in the usual manner by means of fish plates 3 fastened with bolts 5 and` nuts 6.

Blocks 15 or 151 respectively are fastened to the foot 8 of each rail end by welding or in'another rigid manner, or, as suoli may be seen from the drawing, in a detachable manner by means of clamps 9, bolts 11 and nuts 12. 'These blocks are stiffened by means of ribs 14 in order to increase as much as possible their resistibility against bending forces and they are fitted with for instance circular casings 13 and 131 respectively which are provided with concentrically arranged bolts 16, 161. The inner botrtoms of the 4casings 13 carry concentric ring'S 17, 171, between which accurately lifting unelastic cylinders or lamellare 18, 181 are placed and fastened, for instance by welding. The thickness of these lamellae or the respective Vdiameters of same have been so chosen that the lamellte 18 fit accurately between the lamellae 181 and vice versa. The outermost lamella 18 has a circular groove in which is placed a ring 19 of leather or the like serving the object of a. packing so that the interior can be filled with a lubricating means. Hereby the displacement of the lamellae with regard to each other and according to the expansion is facilitated. For the same reason also the dimensions of the lamell 18 and of the bolt-s 16 and the means for fastening the blocks 15 to the rail ends have been so chosen that hollow spaces 2O are formed corresponding in size to the expansion to be expect-ed.

As such may be seen from the drawing the mounting of the new connection does not at all interfere with the other construction of the line, as the device lit-s easily between the sleepers 7 adjacent to the rail ends. Instead of cylindrical lamellae also lamellee of any other desired shape may be used, for instance such having the form of a trapezium. It is of importance for the new construction that the connection has after the style of a bridge an almost indefinitely great moment of resistance against bending which can be easily effected by transmitting the vertical pressure exerted for instance on the bridge part l5 from the lamellze 18 which must be as rigid as possible in a considerably increased area to the lamellae 181 and thus to the other bridge end. It may be mentioned that a slight play between the lamellae, as such may rise in case of a none too careful erection or manufacture will become equalized zuitoniatically.

Butt-joints for rails have already become known which comprise bridge-like elements arranged between the rail-ends. My invention dili'ers however chiefly from these devices by the fact that they do not embody the characteristic feature of my invention, for no provision is made with them that the forces exerted on the bridge during a passing of a load may be transmitted to a considerably increased area, and not until provisions have been made for this, does the bridge according to my invention obtain the almost indefinitely great bending resistance. i

Advantages of the invention may further be seen in that in spite of the large areas working with each other the connection is perfectly free to follow the expansion of the rail-s, and in addition to its effect in a longitudinal direction stiffens the line of the rail also in a transverse direction.

Having now described the nature of my .said invention, I declare that what I claim iszl. A butt-joint for rails, comprising two bridge parts, one fastened to each rail end and lamellae provided for each bridge-part said lamelle@ meshing with each other in the longitudinal direction of the rails, substaninattesa tially as described and for the purpose set forth in the specification.

A butt-joint for rails, comprising two bridge-parts and lainelhe provided for each bridge-part and means for fastening the bridge-parts to the rail ends in a detachable manner, substantially as described and for the purpose set forth in the specification.

3. fr butt-joint for rails, comprising two bridge-parts to be fastened to the rail ends, a plurality of lamellte at each bridge-part and means for fastening the lamellae to the bridge-parts, substantially as described and for the purpose set forth in the specification.

Ll. il butt-joint for rails, comprising two bridge-parts at the rail ends, stiened against bending and unelastic and self-stiffening lainellze and means for fastening the lamelles to the bridge-parts in such a manner that the lamellae of both bridge-parts mesh with each other without play, substantially as described and for the purpose set forth in the specification.

5. A butt-joint for rails, comprising bridge-parts at the rail ends stiffened against bending and cylindric lamellae at each bridge-part and means, in order to permit a displacement of the bridge-parts with regard to cach other according to the expansion of the rails and means for preventing dust from entering the meshing lamelles, substantially as described and for the purpose set forth in the specification.

In testimony whereof I have signed my name to this specilica-tion in the presence of a subscribing witness.

GEORG SCHONW'ALD.

Vitness:

E. HLZERNA. 

